December weather forecast
Rosario, Uruguay

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Weather in December

December, the first month of the summer in Rosario, is a moderately hot month, with an average temperature varying between 19.4°C (66.9°F) and 25.3°C (77.5°F).

Temperature

The start of December brings a subtle shift in the average high-temperature, edging up from November's agreeable 22°C (71.6°F) to a warm 25.3°C (77.5°F). In Rosario, the average nighttime temperature during December is a refreshing 19.4°C (66.9°F).

Humidity

The average relative humidity in December is 67%.

Rainfall

In Rosario, in December, during 10 rainfall days, 66mm (2.6") of precipitation is typically accumulated. Throughout the year, in Rosario, there are 114.7 rainfall days, and 678mm (26.69") of precipitation is accumulated.

Daylight

The month with the longest days in Rosario, Uruguay, is December, with an average of 14h and 24min of daylight.
On the first day of the month, sunrise is at 05:30 and sunset at 19:47. On the last day of December, in Rosario, sunrise is at 05:40 and sunset at 20:04 -03.

Sunshine

The month with the most sunshine in Rosario, Uruguay, is December, with an average of 11.1h of sunshine.

UV index

January through March, November and December, with an average maximum UV index of 6, are months with the highest UV index in Rosario. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, the maximum UV index of 6 suggests this advice:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Enhance your sun protection with tightly woven, yet airy clothing.
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Frequently asked questions

What is the average December temperature in Rosario?

The high-temperature, in December, in Rosario, records 25.3°C (77.5°F), while the low-temperature is 19.4°C (66.9°F). In January, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is estimated at 29°C (84.2°F).

What is the average humidity in December in Rosario?

In December, the average relative humidity in Rosario, Uruguay, is 67%.

How much does it rain in Rosario in December?

In Rosario, during December, the rain falls for 10 days and regularly aggregates up to 66mm (2.6") of precipitation.

When are the longest days in Rosario?

December has the longest days of the year in Rosario, with an average of 14h and 24min of daylight.

How many hours of daylight does Rosario have in December?

In Rosario, the average day length in December is 14h and 25min.

When is the sunrise / sunset in December in Rosario?

On the first day of December in Rosario, Uruguay, sunrise is at 05:30 and sunset at 19:47. On the last day of the month, sunrise is at 05:40 and sunset at 20:04 -03.

What month has the most sunshine in Rosario?

With an average of 11.1h of sunshine, December has the most sunshine of the year in Rosario, Uruguay.

How many hours of sunshine does Rosario have in December?

In December, the average sunshine duration in Rosario is 11.1h.

What are the months with the highest UV index in Rosario?

The months with the highest UV index are January through March, November and December, with an average maximum UV index of 6.

What is the UV index reading in December in Rosario?

In December, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from exposure to Sun's UV rays.

Average temperature in December
Rosario, Uruguay

Average temperature in December - Rosario, Uruguay
  • Average high temperature in December: 25.3°C

The warmest month (with the highest average high temperature) is January (27.2°C).
The month with the lowest average high temperature is July (13.1°C).

  • Average low temperature in December: 19.4°C

The month with the highest average low temperature is January (21.3°C).
The coldest month (with the lowest average low temperature) is July (9.6°C).

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Average pressure in December
Rosario, Uruguay

Average pressure in December - Rosario, Uruguay
  • Average pressure in December: 1011.1mbar

The month with the highest atmospheric pressure is July (1019.1mbar).
The month with the lowest atmospheric pressure is December (1011.1mbar).

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Average wind speed in December
Rosario, Uruguay

Average wind speed in December - Rosario, Uruguay
  • Average wind speed in December: 18.1km/h

The windiest month (with the highest average wind speed) is September (21.1km/h).
The calmest month (with the lowest average wind speed) is December (18.1km/h).

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Average humidity in December
Rosario, Uruguay

Average humidity in December - Rosario, Uruguay
  • Average humidity in December: 67%

The month with the highest relative humidity is September (78%).
The month with the lowest relative humidity is January (66%).

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Average rainfall in December
Rosario, Uruguay

Average rainfall in December - Rosario, Uruguay
  • Average rainfall in December: 66mm

The wettest month (with the highest rainfall) is November (69mm).
The driest month (with the least rainfall) is May (43mm).

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Average rainfall days in December
Rosario, Uruguay

Average rainfall days in December - Rosario, Uruguay
  • Average rainfall days in December: 10 days

The month with the highest number of rainy days is March (11 days).
The month with the least rainy days is June (8.2 days).

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Average daylight in December /
Average sunshine in December
Rosario, Uruguay

Average daylight in December / Average sunshine in December - Rosario, Uruguay
  • Average daylight in December: 14h and 2min

The month with the longest days is December (Average daylight: 14h and 24min).
The month with the shortest days is June (Average daylight: 9h and 54min).

  • Average sunshine in December: 11h and 1min

The month with the most sunshine is December (Average sunshine: 11h and 6min).
The month with the least sunshine is June (Average sunshine: 6h and 0min).

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Average sunshine days in December
Rosario, Uruguay

Average sunshine days in December - Rosario, Uruguay
  • Average sunshine days in December: 19.2 days

The month with the most sunshine days is August (21.3 days).
The month with the least sunshine days is February (16.6 days).

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Average UV index in December
Rosario, Uruguay

Average UV index in December - Rosario, Uruguay
  • Average UV index in December: 6

The months with the highest UV index are January, February, March, November and December (UV index 6).
The month with the lowest UV index is July (UV index 3).

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Average cloud cover in December
Rosario, Uruguay

Average cloud cover in December - Rosario, Uruguay
  • Average cloud cover in December: 19

The month with the most cloud cover is July (Cloud cover 38).
The month with the least cloud cover is January (Cloud cover 17).

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Average visibility in December
Rosario, Uruguay

Average visibility in December - Rosario, Uruguay
  • Average visibility in December: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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Rosario, Uruguay

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